Determining $H_0$ from distance sum rule combining gamma-ray bursts with observational Hubble data and strong gravitational lensing

Summary

The Hubble constant (H0) is a crucial cosmological parameter that represents the universe's expansion rate. Different methods have been used to measure H0, but the results show a persistent tension. This study uses a model-independent approach, combining gamma-ray bursts (GRBs) with observational Hubble data and strong gravitational lensing, to constrain H0.

Highlights

• The study uses a model-independent approach to constrain the Hubble constant (H0).
• Gamma-ray bursts (GRBs) are used as high-redshift distance indicators.
• The analysis combines GRBs with observational Hubble data and strong gravitational lensing.
• The results agree with the local measurement of H0 from type Ia supernovae at 1σ level.
• The inclusion of GRBs has a negligible impact on the value of H0.
• The study suggests that GRBs can be used to trace the expansion history of the universe.
• The results may indicate that the Hubble tension is due to the need to reconcile early- and late-time data.

Key Insights

• The use of GRBs as high-redshift distance indicators can provide an independent measurement of H0, which can help to resolve the Hubble tension.
• The model-independent approach used in this study allows for a more flexible and general analysis, without relying on a specific cosmological model.
• The combination of GRBs with observational Hubble data and strong gravitational lensing provides a more comprehensive understanding of the universe's expansion history.
• The agreement between the results and the local measurement of H0 from type Ia supernovae suggests that the Hubble tension may be due to the need to reconcile early- and late-time data.
• The negligible impact of GRBs on the value of H0 indicates that they can be used as a reliable tool for tracing the expansion history of the universe.
• The study highlights the importance of using multiple probes and techniques to constrain cosmological parameters and understand the universe's evolution.
• The results of this study may have implications for our understanding of the universe's expansion history and the properties of dark energy.

Mindmap

Citation

Luongo, O., & Muccino, M. (2024). Determining $H_0$ from distance sum rule combining gamma-ray bursts with observational Hubble data and strong gravitational lensing (Version 1). arXiv. https://doi.org/10.48550/ARXIV.2412.18493